1.5" 100/110 degree slopey campus rung

1.5" is a huge and really you are sloper training at this point. These sloper campus board rungs are an awesome size to train open handed.
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T-nut (Round Base Zinc)

screw on brad hole t-nuts

Peg Board Receiver - 15 degree wall - One hold

Angled for the standard 15 degree campus board